Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/12/2020   22:17:29   (   0.00,-137.22) (   0.98,-132.99)  482.89                80
 12/14/2020   10:36:36   (  -0.00,-137.22) (   0.24,-138.26)  118.51                80
 12/15/2020   10:20:32   (   0.00,-137.21) (  -0.77,-133.73)  397.05                80
 12/16/2020   22:39:49   (  -0.01,-137.20) (  -0.40,-139.04)  209.45                80
 12/17/2020   22:23:45   (  -0.01,-137.19) (   0.61,-134.51)  305.87                80
 12/19/2020   10:42:52   (   0.01,-137.18) (   0.61,-139.77)  296.31                80
 12/20/2020   10:26:48   (   0.01,-137.17) (  -0.40,-135.24)  218.87                80
 12/21/2020   22:46:05   (  -0.00,-137.15) (  -0.77,-140.55)  388.12                80
 12/22/2020   22:30:00   (  -0.00,-137.14) (   0.24,-136.02)  126.87                80
 12/24/2020   10:49:09   (   0.00,-137.12) (   0.92,-141.30)  475.82                80
 12/25/2020   10:33:04   (   0.01,-137.10) (  -0.09,-136.77)   38.83                80